"I've been telling all my students and glass friends about your products."


~ Terri Stanley
Studio Glass Artist


To share your comments on R&R GLASS-CAST investments, contact R&R’s Marketing Department.


Customer Testimonials

R&R® Glass-Cast™ 101 BANDUST™ investment

"The R&R GLASS-CAST 101 BANDUST investment has treated me very well. It's much easier to use because there's virtually no dust! Also the end result gets me a smoother and shinier finish. Lastly the mixture with water is very forgiving and too much or too little seems to work very well. I thoroughly recommend this product!"
~ Robin Lehman, Robin Lehman Glass

"Great investment material. I have used this product for over a year now and find it easy to blend and easy to clean up after firing. No negatives for the open face casting process that I am doing in glass."
~ Michael Beaman

"Significantly reduced dust. Great surface. Healthy alternative mold mix that gives a translucent surface without sanding."
~ Anonymous Glass Caster

R&R® Glass-Cast™ 400 investment

"Best out there for glass casting. No breakage - one thick coat is all that's needed. This product is great for kiln cast glass."
~ Mary Colm

R&R® Glass-Cast™ 910 investment

"Of course I’m still casting glass with R&R GLASS-CAST 910 investment, and having wonderful results! The latest pieces have fragile areas with crisp lines and sharp edges. As always, R&R GLASS-CAST 910 investment worked perfectly for me. I've been telling all my students and glass friends about your products.”
~ Terri Stanley, Terri Stanley Cast and Kilnformed Glass

"The R&R GLASS-CAST 910 investment is fabulous! It is an exceptional product. I use it when teaching at various academic/creative institutions."
~ Matthew Day Perez, MatthewDayPerez

"Investment removes cleanly. I loved using R&R GLASS-CAST 910 investment and was thrilled with how it withstood over 514 hours casting time for the 29 pound piece I just finished. I didn't use a flask for this application, but threw on layers, each colored a bit differently, and because I was scared of leakage, dipped fiberglass cloth pieces into the investment for one of the layers. The fiberglass layer was probably overkill. This work was planned for one-time use but with the strength of the mold, if it hadn't had so many undercuts, the material would have withstood more castings. It left a really clean finish on the glass and the only clean up I have to do is to clean up my mistakes, which were many. I liked it so much I ordered 100 pounds more!"
~ Elena Wright, Custom Art Glass

R&R® Glass-Cast™ 965 investment

"Great investment plaster for glass. Use this product a lot. No negatives at all."
~ Anonymous Glass Caster

R&R® Mold-Mix 50/50 investment

"A good 50/50 product. This product is better than most out there."
~ Anonymous Glass Caster