Aqua-Resin is 2 components: a water-based resin (L) and a gypsum-based powder (S3). These components can be mixed in various ratios, but for most applications, we recommend 1 part liquid to 3 parts powder, by weight.

Our proprietary formula is VOC-free and is less than 10% derived from petrochemicals. It is also OSHA, EPA and LEED compliant.

Our newer Putty W™ powder is a different formulation which also mixes with L liquid to form a putty/filler material.

We also offer various additives such as THX-6 and Aqua-Color to help you achieve your desired results, and fiberglass components for additional strength.

No, it is opaque, except in thin layers, where it is translucent like a piece of paper. 

Yes, Aqua-Resin is ideal for use in silicone molds.

The working time for a normal Aqua-Resin mix is approximately 40 minutes, the set time is around 50 minutes and de-mold time from a soft rubber mold around 90 minutes.

L/S3 is pourable, which makes it ideal for terrazzo and marbleizing. It is also brushable, which is recommended for coating foam and wetting out fiberglass. It is off-white in color.

Putty W is a replacement for polyester auto body filler. It is thicker than L/S3, tan in color, and can be applied with a putty knife, for projects such as filling holes, repairing wood, and direct sculpting.

The average set time for L/S3 is about 50 minutes.

The average set time for Putty W is 5-10 minutes.

Cured Aqua‐Resin itself is a fairly dense and therefore a heavy material. But its density contributes substantially to its strength, so that parts made with it can be quite thin, typically no more than 1/8” wall thickness. At this wall thickness, rather light weight parts are produced, so one may say that Aqua‐Resin is actually a light weight material.

The shelf life for the L Liquid Component, when stored at room temperature in unopened containers, is two (2) years from date of manufacture for 43 lb pails and all smaller sizes. For unopened 473 lb drums of the L Liquid Component, when stored at room temperature, the shelf life is one (1) year from date of manufacture. 

All sizes of the S3 Powder Component, when kept from moisture and in an unopened container stored at room temperature, have a shelf life of two (2) years from date of manufacture.

Yes, we have a line of color dispersions, Aqua-Color™,available in red, yellow, blue, black and white. Various other materials may be added to alter color and appearance including mineral aggregates, dry pigments, colored flock, metal powders, etc., but please make sure any of the powders are safe and non toxic before using. The use of acrylic paint and paint tinting colors for coloring Aqua‐Resin is not recommended. Cured Aqua‐Resin, can of course, also be painted; it accepts virtually all paints with no problems.

> Color Mixing Guide
> Saturation Guide

The generally recommended mix ratio for Aqua-Resin is 1 part L liquid to 2 parts S3 powder by volume, or 1 part L liquid to 3 parts S3 powder by weight. To calculate the total volume of your mixture using these proportions, simply double the volume of your L liquid. So, for example, combining 8.8lbs of L liquid (1 gallon) with 26.4lbs of S3 powder (2 gallons) would yield approximately 2 gallons of mixture.

To look at it another way, a close approximation would be, if the mold is filled with water, one half the weight of the water would be the weight of the L Liquid.

For more detailed notes on coverage, please see our coverage sheet. 

Not usually, for most basic casting and laminating uses, measuring by volume is fine. If, however, for instance, you need to visually duplicate gel coat color on multiple pieces or ensure consistent thermal expansion for exterior temperature extremes, then weighing is recommended.

No, not necessarily. If you are doing non‐critical work such as a mold jacket or a rough textured surface, for instance, hand mixing is adequate. If you are formulating a gel coat or working in very thin layers, or need batch to batch consistency, then power mixing is recommended. One of the best mixing blades we have found for Aqua-Resin is a spring-bowtie mixing blade. But something that works just as well is actually using a single mixing blade from a typical electric, 2 blade, kitchen hand mixer.

Aqua-Resin does not need to be sealed, but there are times when we recommend it:
- when you want to eliminate the porosity of Aqua-Resin
- when you require a finish that a sealer can provide
-when your project will be in frequent contact with water
-when you require a safe finish for food contact (please see information on food safety below)
We suggest, for instance, AFM Safecoat’s line of eco-friendly sealers.

Yes, but certain precautions and procedures must be adhered to. Please see our sheet on exterior use.

In accordance with the Labeling of Hazardous Art Materials Act, our products have been evaluated by an independent toxicologist and shown to have no chronic health risk.

“Non-toxic” means “non-toxic when used as intended, and according to instructions”. Follow the instructions and safety precautions provided with each product. When used in this way, you will find Aqua-Resin to be non-toxic.

You need a mask only if there is excessive dusting; there are no harmful fumes. Gloves are suggested because Aqua-Resin is difficult to remove from skin. (Cured Aqua-Resin can be scrubbed off the skin with soap and water.) And, also, Aqua-Resin does contain a preservative which some people can become allergic to. It, however, is the same preservative used in dish soap or shampoo, and in the same proportions. 

Yes, Aqua-Resin is heat resistant and safe to use in the making of conventional candle vessels. The L/S3 combination has been tested for flame spread and received a Class A rating according to the National Fire Protection Association. Aqua-Resin can withstand the temperature of hot wax but, as with most materials, may burn with sustained, direct contact with a flame.

While Aqua-Resin has not been specifically tested by the FDA for food contact safety, there are various food safe coatings suggested by Home Depot you can try:

1. Shellac

2. Pure Tung Oil

3. Food Grade Beeswax

4. Carnauba Wax

5. Food Grade Mineral Oil

6. Walnut Oil

7. Raw Linseed Oil

8. Paraffin Wax

Also, according to FDA regulations, the typical clear wood finishes that dry to a hard film are considered food safe. Wait to use the surface until the finish is completely dried, and clean it before allowing food contact. 

No, please, do not ingest any amounts of Aqua-Resin in any form.

By law, all art materials sold in the U.S. must bear the phrase "conforms to ASTM D-4236," confirming that they have been properly labeled for any chronic health hazards, in accordance with the federal Labeling Hazardous Art Materials Act (LHAMA). Under LHAMA, all art materials must be evaluated by an independent toxicologist to determine if any chronic health hazards do exist in the product. All our products have been evaluated; none of our products pose a chronic health risk.

Depending on application methods, brushing Aqua-Resin® generally produces no surface bubbles since the brushing action breaks any bubbles as they appear. But, solid casting into a mold can produce a significant amount of bubbles. Generally, these bubbles are not desirable. Here are a few ways to eliminate them in casting. In all cases, pour your mix in just one spot to avoid catching air.

1)      Mixing, by weight, to yield a slightly thicker mix: 1 part L to 3-1/2 parts S3 will provide a mix with significantly less bubbles.
2)      Waiting 15 to 30 mins before pouring also produces a thicker mix with less bubbling.
3)      Vibrating the mix will cause bubbles to rise to the surface and break. Vibration can be achieved by the use of a vibrating table or simply hitting the mixed container or the mold with a hard-surfaced tool or even with the side of your hand. Vibrating tables, or the instructions to make one, can be found on YouTube.
4)      Using a surfactant, or a home-made debubblizer solution is perhaps one of the most effective ways of eliminating surface bubbles. However, surfactants can often cause some discoloration of the cast surface. But, if the piece can be painted, this will not be an issue. Two brands of surfactant made for treating molds are Almore Debubblizer and Russman Debubblizer. Other products that can be adapted for this use are Kodak Photo-Flo, Windex Spray, and Jet Dry dishwasher rinse agent. A very effective debubblizer can be made by putting a few drops of liquid dish soap in 4 ounces of water. This needs to be sprayed on your molds, lightly and immediately before pouring, using a FINE MIST SPRAYER.

There are a few other methods of debubblizing, but using one or all the methods above should give you satisfactory results.

Problems may occur, for a number of reasons, beyond Aqua-Resin’s control. Ambient temperature, mixer type, mixer speed, cleanliness of both the mixer and the mixing vessel, volume versus weight proportions when mixing, not mixing long enough, age of material, storage conditions, additives, etc. all can contribute to an unsatisfactory result.

There are a few tricks that can possibly help to rectify an unwanted result.

A splotchy looking casting is typically caused by not mixing long enough and not at high speed. Try mixing for a full minute at high speed. If satisfactory, for subsequent batches, you can reduce mixing time incrementally to as little as thirty seconds.

Another is to add a little THX-6 to the mix. A 0.5 % of a THX-6 Premix (instructions) added to the mix could help even out a number of problems, even splotchiness when it occurs with Aqua-Color.

Yet another is to do a double mix: Power-mix for 30 seconds, wait 5 minutes, then Power-mix again for 30 seconds.

It would be a good idea to test the above suggestions on a smaller scale before working on a full scale project.

Aqua‐Resin is always happy to provide technical help. We do ask, however, that you read all relevant instructions prior to asking for help. Links to our instructions can be found on our PRODUCTS page by clicking on the product names. Very often your questions will be answered in these instructions. If not, please email us at info@aquaresin.com and please include a phone number if you like. 

Generally nothing. The L Liquid can withstand multiple freeze/thaw cycles before it becomes unusable. We guarantee a minimum of five cycles. Regarding our other products, none will suffer having been frozen. However, THX-6 and Aqua-Color, once thawed, should be re-stirred.

Aqua-Resin does not shrink at all when setting, but rather it expands—typically about 0.06%. Although, due to the various mixing proportions used, method of application—casting, laminating, etc., the expansion can vary considerably.

This small amount of expansion typically is unnoticed and can be disregarded, but in certain specific situations, especially in making large scale molds this expansion needs further explanation.

Please request some of our additional thinking on the topic.

If you believe you have received a defective, or misrepresented, Aqua-Resin product, please contact us within 60 days of receipt of the product by emailing arcustomerservice@aquaresin.com or calling us at 212-226-1208. In the case that the product is deemed defective, or misrepresented,  upon inspection by Aqua-Resin, we will, at our sole discretion, either ship a replacement for the product free of charge, or refund the purchase price.

In no event will Aqua-Resin be liable for any incidental, special, indirect, or consequential damages.

Aqua‐Resin is what is referred to as a “composite” material, and as such is a combination of a high compressive strength matrix (the Aqua‐Resin mix) and a high tensile strength fiber (fiberglass). This combination of two material types results in an extremely strong, rigid, yet light-weight material.

When making small, hand held objects such as coasters, ashtrays etc. which typically are 3/8” to 5/8” in thickness, the use of fiberglass may not be necessary and in some cases may cause interference— for instance, with terrazzo chips.

Not the fiberglass used in our fiberglass products. This is a relatively large diameter fiber, which, even when fractured, breaks into particles considered too large to enter deeply into the lungs where it might do some harm. However, in contrast, the fiberglass used in fiberglass insulation for home construction is a very fine filament glass. This type of fiberglass has a small enough diameter to enter deeply into the lungs and is therefore considered a possible carcinogen. None of our products contain this small diameter fiberglass.

We suggest using our three fiberglass products, Aqua-Axial 2, Aqua-Veil and Aqua-Glass because conventional fiberglass such as fiberglass cloth, chopped strand mat and chopped fiberglass strands typically have a sizing on it that is only compatible with polyester resin, but will not dissolve in Aqua‐Resin. The fact that this non‐compatible sizing will not dissolve prevents full surface contact of the Aqua-Resin mix to the individual fiberglass filaments and therefore can result in less than optimal strength. This being said, if you do not require optimal strength, you can use conventional chopped strand mat or chopped fiberglass strand.

The two longer cuts, 3 ½-1” and 4 ½”, are intended as a principal reinforcing fiber in an Aqua-Resin laminate.  We find that fiber lengths over 3” provide substantially stronger laminates. Because of correct binder compatibility with Aqua-Resin mixes and their unusually long fiber lengths, they produce exceptionally stronger parts than would conventional chopped strand mat for instance.  The 3 ½-1” is used for laminates with tight curves and irregular geometry, while the 4 ½” is useful for rapid building of flatter areas or gentle curves. 

Yes, especially regarding the longer fiber lengths, 3 ½-1” and 4 ½”, If you look at the total cost of a finished part, you will see that they save you money.  At the total recommended 8-10% fiberglass content, the extra cost of our fiberglass would admittedly add to the finished part cost. But because of the extra strength gained, you will easily find that required thickness would approximately be cut in half if you are comparing what you would need using chopped strand mat. At half the thickness, the savings in total finished cost would be in proportion.  You will have a lighter stronger less expensive part--also, with the additional saving in labor fabricating a lighter part. Additionally, savings on shipping, installations, etc.