HTPB Rubber

HTPB - Hydroxyl Terminated PolyButadiene R45

This is the classic solid rocket motor binder!

Typical mixing ratio for best cure is 88% HTPB - 12% Papi 94 when mixed with our Papi 94 a room temperature cure catalyst.

This product is available by itself or as a kit with Papi 94.

Our room temperature cure compound is perfect as a hybrid fuel, binder for solid motors, to make rubber components by casting, making insulation when used with silica microballoons, or as a slow curing rubber bonding agent.

In kit form, each kit, contains one gallon of R45M and enough Papi 94 curative (by weight) to make over 45 pounds of propellant when used with your favorite APCP brew!

HTPB/Papi 94 Kit is comprised of:
- One Gallon container of HTPB
- One 12 ounce container (415 grams by weight) of Papi 94

We cannot ship the HTPB or Papi outside the United States

Propep density values for R45 family in pounds per cubic inch:
844 R45     0.03250
845 R45 HT  0.03360
846 R45M    0.03430

More info on Papi 94 at dow.com

Download the Papi 94 pdf - 38k

We cannot ship the HTPB or Papi outside the United States