Hardner & Strength Formula. Hard Mass Gains. Strength Gains. Dryness. Joint Lubrication. Minimal Side Effects. 30% Stronger. Ultra Concentrated Formula. Strongest on the market. Decavol RDe delivers more: Hard Mass Gains, Strength Gains, Dryness, Joint Lubrication, Minimal Side Effects, than any other legal product on the market. Decavol RDe stacks well with 4AD.